Hut-lock



C. PREJEAN.

NUT LOCK.

APPLICATION FILED SEPI. I5, |919.

Patented Dec. 23, 1919.

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s'rafi GLEOMAB, REJEAN,` 0l@ VRMILON Plrlblll, NEAR MILULN, LUlIANA, ASSIGNOR OF ONE-HALF T0 CLINS Ii. BitUSl-RD, OF HABLAN, LOUISIANA..

Specification of Letters Patent.

Patented Dec. 23., 1919.,

Application filed September 15, 1919. Serial No. 323,761?.

To all 'ui/0m 'it l11mg/ concer/n.:

lzle it known that l, @Lucerna Pensioen, a citizen of the United States, residing); in Vermilion parish, near Milton, in the parish of Lafayette and @State of Louisiana, have in- `vented certain nenT and useful improvements in Nut-Locks; and l do declare the i"ollo\vina' to be a lull7 clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to malte and use the saine.

This invention relates to improvements in nutlochs; the primary object being` to provide a more simple and practical loch than heretofore used.

another object is to provide a device of this character in which the locking; mechanisni is protected against the Weather by a rotatable collar or truard.

With the above and other objects in View the invention consists of certain novel ieatures oi' construction, and the combination and arrangement ot parts as will be more fully described and claimed.

l attain these objects by the mechanism illustrated in the accompanying drawing, in which:

Figure 1 is a longitudinal sectional view through a nut-lock constructed in accordance With this invention, the various parts oi the device being' shown in locked position.

Figi'. 2 is a longitudinal section through the guard ring', showing the inner and outer nuts partly in elevation and partly in section and illustrating one olf the parvis carried by the inner nut in engagement with the ratchet teeth disposed on the outer nut.

Fig. 3 is a transverse sectional vieiv olf the nutloclt taken on the plane indicated on the line of Fig'. 1.

Fig. 4l is a bottoni plan View oi 'the outer nut; and,

Fin". 5 a longitudinal sectional View through a portion oiq the nut-loch., the PQjuard ringl having' been disengaged from the plunejer carried b v the inner nut p and rotated upon the latter so that its plunger receiving' opening' is disposed adjacent the palvl actuating cani and illustrating a tool inserted through the opening into the soc liet of the cam for turning;- the saine.

The embodiment illustrated includes a fas toning bolt 1, right screw thread? the outer end 2 oit' the bolt preferably being` reduced and provided with a left screw thread. This improved lock nut is composed of three members, an inner nut 3, an outer nut l and a collar or guard ring' 5, the inner nut including' the usual rig-@ht threaded central bore. 'lfhe inner end of the inner nut is reduced in diameter to provide a shoulder G against which abn-ts the inwardly directed flange 7 of the guard ring 5., said guard having an opening` 8 therein, through which is projected the re duced outer end off a spring," pressed plunfrer 9, said plunger being; seated in a suitable recess 10 iornied in the collar nut.

The inner nut is provided in its outer face with one or more recesses 11, preferably tivo in number, positioned diametrically opposite each other, each recess beingelongated and provided substantially midway its length with an upstandinp; portion 12, in the upper end of which is viorined a seat for reception oi an apertured ear on a pavvl 13. 'lhe pavvl is provided on its forward end with an inwardly directed shank 14 which serves as a pguide i'or a coil spring 15 Whose function is to press the biting portion 16 outwardly bevond the outer face of the nut into engagement with the teeth on the outer nut. rllhe inner tace of the rear portion oi the paivl contacts with a cam 17 Which is provided With. an angular recess adapted to receive a suitable instrument for rotation of said cam. in opening` is i'orined in the inner nut and communicates with the recess l1 and alined with the angular opening in the cam 17 whereby the aforementioned instrument may be inserted ior rot-ating the cam. Y The `guard ring is of appreciably ,greater Width than the inner nut 3 so that when the two nuts are looked tog-ether it will be impossible to insert a tool between the nuts and depress-the patvl or paivls.

in annular guide flange 18 is formed on the inner iace of the outer nut il, and is adapted to he received in the annular recess 'formed by reducing the diameter of the bolt and by cutting1 away a portion oi the thread ed bore ot the inner nut as shown at 19, said flange and annular recess serving to center the outer nut when it is to be threaded on the bolt 1.

@ne or more studs 20 are provided on the inner face of the collar nut 3 and are adapted to bite into the adjacent one of the members being bolted together, or they may be received in sockets specially formed for that v ring to retain the parts against relative' movement. The outer nut is then threaded on the bolt and tightened against the inner nut, thereby locking the tivo nuts together.

ldlhen the nuts are to be removed the plunger must be retracted so that the guard ring may be rotated for alining the opening in 'l said ring With the rotatable cam. 2O

These parts being alined, a suitable instrument may be inserted and the cam rotated, thereby reti-acting the paWl or pawls whereupon the nuts may be readily separated.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood Without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to Without departing from the principle or sacriticing any of the advantages of the clain'red invention.

I claim:

l. Thecombination with a bolt having right and left threads, of nuts on said threads, ratchet teeth on one of said nuts, the other nut having a recess, a paWl pivoted between its ends in said recess and movable into engagement With said teeth, and a rotatable cam mounted in said recess to retract said paWl, said cam having an instrument engaging portion to permit rotation of said cam.

2. The combination with a bolt having right and le'lt threads, of nuts on said threads, paWl and ratchet connection between said nuts, a rotatable cam in one ol' said nuts for retracting said pawl and having an instrument engaging portion, a guard rotatably mounted on one of said nuts and having an opening adapted for alinement with the instrument engaging portion to permit the insertion of an instrument :tor rotating the cam.

3. The combination with a bolt having right and left threads, of nuts on said threads, pau'l and ratchet connection between said nuts, a rotatable cam in one of said nuts for retract-ing said pawl and having an instrument engaging portion, a guard rotatably mounted on one of said nuts and having an opening adapted for alinement with the instrument engaging portion to permit the insertion of an instrument 'for rotating the cam and means 'for normally retaining the guard against rotation.

i. The combination with a bolt having right and left threads, of nuts on said threads, pawl and ratchet connection between said nuts, means 'for pern'iitting retraction ot' said paul, a rotatable guard earried by one of said nuts and having an opening in one side, a spring pressed plunger' carried by one of said nuts for reception in said opening to retain the guard against rotation, said plunger being retractable to permit rotation of the guard for alining said opening and the means for permitting retraction of the pawl, whereby an instrument may be inserted to retract said pawl.

1n testimony whereof I have hereunto set my hand.

CLEOMAR PREJEAN. 

